As of the census of 2000, there were 90,205 people, 33,327 households, and 22,695 families residing in the city. The population density was 4,071.6 people per square mile (1,572.4/km²). There were 35,309 housing units at an average density of 1,593.8/sq mi (615.5/km²). The racial makeup of the city was 82.72% White, 1.89% African American, 0.94% Native American, 3.33% Asian, 0.27% Pacific Islander, 7.02% from other races, and 3.82% from two or more races. Hispanic or Latino of any race were 11.90% of the population.
There were 33,327 households out of which 36.2% had children under the age of 18 living with them, 50.9% were married couples living together, 12.0% had a female householder with no husband present, and 31.9% were non-families. Out of all households, 24.3% were made up of individuals and 7.8% had someone living alone who is 65 years of age or older. The average household size was 2.67 and the average family size was 3.17. In the city, the population was spread out with 27.5% under the age of 18, 11.1% from 18 to 24, 30.3% from 25 to 44, 21.2% from 45 to 64, and 9.8% who were 65 years of age or older. The median age was 32 years. For every 100 females, there were 97.8 males. For every 100 females age 18 and over, there were 94.9 males. The median income for a household in the city was $43,442, and the mean income for a family was $51,126. Males had a median income of $37,701 versus $27,744 for females. The per capita income for the city was $19,588. About 8.4% of families and 12.5% of the population were below the poverty line, including 17.2% of those under the age of 18 and 6.7% of those 65 and older.
Gresham is accessed from Interstate 84 and U.S. Route 26.
The city of Gresham is serviced by TriMet's bus system, MAX Light Rail line as well as the fareless Sandy Area Metro (SAM) shuttle bus to Sandy, Oregon. The Blue Line contains the following MAX stations: